Amino acids are categorized by their chemical properties on the basis of the sequence of side chain (R group).
<h3>What are amino acids?</h3>
Amino acids are known as the 'building blocks of the life' as they help in the formation of proteins inside the body.
Side chain of amino acids is specific in nature and are known by the name of R group, these R groups are attached with the alpha carbon atom. R groups characterizes below properties of the molecule:
- Shape
- Size
- Charge and
- Reactivity
Hence R group describes the chemical properties of amino acids.
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Answer:
5.0 carat x (0.200g / 1 carat) x (1 cm³ / 3.51g) = 0.28 cm³... with 2 sig figs..
Explanation:
USE DIMENSIONAL ANALYSIS. That is the point of this problem. That is why Dr. Zumdahl wrote this problem and put it in his textbook (chpt 1 Problem #57 if you're using the 7th edition, chpt1 problem #63 if you're using his 8th edition).
Answer:
Mass of KCL = 218 grams.
Explanation:
Step 1: calculate the heat that must be absorbed(q).
Heat that must be absorbed(q) is calculated as follows:
q= m c (T2-T1).
q = 750g (4.18 J/gC)(20-4 C) = 5.016X10^4 J = 50.16 kJ
Step 2: we determine moles of KCL as follows:
Moles KCl = 50.16 kJ / 17.2 kJ/mol = 2.92 moles.
Step 3: calculate mass of KCL:
Mass of KCl = 2.92 mol X 74.55 g/mol = 218g.
Therefore, 218 grams of KCL would have to be dissolved into 750 g of 20.0°C H2O to produce the solution.
Answer:
The answers to your questions are given below
Explanation:
1. 3 Na2SO4
Molecules of Na2SO4 = 3
Na (sodium) = 3 x 2 = 6
S (sulphur) = 3 x 1 = 3
O (oxygen) = 3 x 4 = 12
2. 4 Pb(NO3)2
Molecules of Pb(NO3)2 = 2
Pb (lead) = 4 x 1 = 4
N (nitrogen) = 4 x 2 x 1 = 8
O (oxygen) = 4 x 3 x 2 = 24